would manpower sustain

Yes it is definitely having impact on manpower for those who do a lot of manual labor. I'm not sure where you are from but I do know that many people have lost their jobs due to computers and machines being able to do the same jobs as humans for cheaper. It seems as though in this world today, if you don't have computer knowledge and education, you aren't getting very far. I know I'm thinking of changing my career towards computers, but then I think what if one day all the computers crash and we go back to using paper and files. Do you think that would ever happen?

If I am right it is not evolution, but it is revolution in computer. Definitely it will have far reaching effect on manpower, but it cannot replade totally. Manpoweer is required, may be minimized in all spheres of life.